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Subject[PATCH v2] staging: vt6656: Add formula to the vnt_rf_addpower function
Date
Use a formula to calculate the return value of the vnt_rf_addpower
function instead of the "if" statement with literal values for every
case.

Signed-off-by: Oscar Carter <oscar.carter@gmx.com>
---
Changelog v1 -> v2
- Change the type of "base" variable from s32 to int as Dan Carpenter
suggested.
- Remove the "--" postoperator and replace with (base - 1) as Dan
Carpenter suggested. Also, as this expression has a minus before the
parenthesis, remove it an apply the minus operator changing the sign of
"base" and literal "1".

drivers/staging/vt6656/rf.c | 20 +++-----------------
1 file changed, 3 insertions(+), 17 deletions(-)

diff --git a/drivers/staging/vt6656/rf.c b/drivers/staging/vt6656/rf.c
index 06fa8867cfa3..612fd4a59f8a 100644
--- a/drivers/staging/vt6656/rf.c
+++ b/drivers/staging/vt6656/rf.c
@@ -538,28 +538,14 @@ int vnt_rf_write_embedded(struct vnt_private *priv, u32 data)

static u8 vnt_rf_addpower(struct vnt_private *priv)
{
+ int base;
s32 rssi = -priv->current_rssi;

if (!rssi)
return 7;

- if (priv->rf_type == RF_VT3226D0) {
- if (rssi < -70)
- return 9;
- else if (rssi < -65)
- return 7;
- else if (rssi < -60)
- return 5;
- } else {
- if (rssi < -80)
- return 9;
- else if (rssi < -75)
- return 7;
- else if (rssi < -70)
- return 5;
- }
-
- return 0;
+ base = (priv->rf_type == RF_VT3226D0) ? -60 : -70;
+ return (rssi < base) ? ((rssi - base + 1) / -5) * 2 + 5 : 0;
}

/* Set Tx power by power level and rate */
--
2.20.1
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